The yellow icon on the screen indicates the camera is locking files, which can be triggered manually or automatically.
Two ways to lock files Manually:
①Press the yellow triangle button on the camera.
②Press the Bluetooth control, you can install it in a position you can easily access as in the below pic. (Note: A119 V3 and older models do not support Bluetooth control.)
Once triggered by G-Sensor / Parking G-Sensor, the camera shall also lock videos automatically, which shall not be overwritten by regular videos.